metrics: Add TagCounterFiltered metrics for handler calls

[ohill]

Summary

This adds additional performance metrics split by tag for message handler calls, for calculating average duration per call per tag.

Test Plan

Existing tests should pass.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 55.87%. Comparing base (8d228c0) to head (d0bb45d).

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #6013      +/-   ##
==========================================
- Coverage   55.89%   55.87%   -0.03%     
==========================================
  Files         481      481              
  Lines       68357    68361       +4     
==========================================
- Hits        38210    38198      -12     
- Misses      27551    27562      +11     
- Partials     2596     2601       +5     

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